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#ifdef DEVICE_WATCHDOG

#include "watchdog_api.h"
#include "mbed_error.h"

#include "mxc_sys.h"
#include "wdt_regs.h"
#include "wdt.h"
#include "system_max32670.h"


watchdog_status_t hal_watchdog_init(const watchdog_config_t *config)
{
    int i;

    // WDT Disable
    MXC_WDT_Disable(MXC_WDT0);

    uint32_t number_of_tick = ( (float)config->timeout_ms * (float)PeripheralClock) /1000;

    // Find top bit index
    for (i=31; i >= 16; i--) {
        if ( number_of_tick & (1<<i) ) {  
            if (number_of_tick & ~(1<<i)) {
                i+=1; // round up if is there any more tick
            }
            break;
        }
    }

    if (i > 31) {
        i = 31; // max
    } else if (i < 16) {
        i = 16; // min
    }
    
    mxc_wdt_cfg_t wdt_cfg;

    wdt_cfg.mode = MXC_WDT_COMPATIBILITY;
    
    wdt_cfg.upperResetPeriod = (mxc_wdt_period_t)(31-i);
    wdt_cfg.lowerResetPeriod = (mxc_wdt_period_t)(31-i);
    wdt_cfg.upperIntPeriod   = (mxc_wdt_period_t)(31-i);
    wdt_cfg.lowerIntPeriod   = (mxc_wdt_period_t)(31-i);

    MXC_WDT_Init(MXC_WDT0, &wdt_cfg);

    MXC_WDT_SetResetPeriod(MXC_WDT0, &wdt_cfg);
    //MXC_WDT_SetIntPeriod(MXC_WDT0, &wdt_cfg);
    hal_watchdog_kick();

    MXC_WDT_EnableReset(MXC_WDT0);
    MXC_WDT_Enable(MXC_WDT0); 

    return WATCHDOG_STATUS_OK;
}

void hal_watchdog_kick(void)
{    
    MXC_WDT0->rst = 0x00A5;
    MXC_WDT0->rst = 0x005A;
}

watchdog_status_t hal_watchdog_stop(void)
{
    MXC_WDT_Disable(MXC_WDT0);

    return WATCHDOG_STATUS_OK;
}

uint32_t hal_watchdog_get_reload_value(void)
{
    uint32_t rst_period = (MXC_WDT0->ctrl & MXC_F_WDT_CTRL_RST_LATE_VAL) >> MXC_F_WDT_CTRL_RST_LATE_VAL_POS;
    uint32_t val = (1<<(31-rst_period));

    return ( (float)val / (float)PeripheralClock) * 1000;
}

watchdog_features_t hal_watchdog_get_platform_features(void)
{
    uint32_t max_wdt_val = 1<<31; // max val
    watchdog_features_t features;

    features.max_timeout = ((float)max_wdt_val / (float)PeripheralClock)*1000;
    features.update_config = true;
    features.disable_watchdog = true;
    features.clock_typical_frequency = PeripheralClock;
    features.clock_max_frequency = PeripheralClock;

    return features;
}

#endif // DEVICE_WATCHDOG